Synonyms of the word 
ARIDNESS → ARIDITY - DRYNESS - THIRSTINESS - WATERLESSNESS - XEROTES
aridness
- n. The state or quality of being arid.
aridity
- n. A long term lack of rainfall or moisture.
dryness
- n. (uncountable) A lack of moisture.
- n. The degree to which something is dry.
thirstiness
- n. The property of being thirsty; thirst.
waterlessness
- n. Absence of water.
xerotes
- n. (pathology) A general dryness of the body.
If you are interested in words, visit the following sites :
- wiktionary.org/aridness For complete definition of a word
- 1word.ws/aridness to play with words, suffixs, prefixs, etc.